Table 2.

Cosinor analysis of the wrist-skin temperature of the day and shift workers.

Group	Mesor, °C	Amplitude, °C	Acrophase
Total
Day workers	33.8 ± 0.4	0.93 ± 0.40 2	04:11 ± 02:59 a.m. 2
Shift workers 1	33.9 ± 0.5	0.82 ± 0.36 2	08:03 ± 05.05 a.m. 2
Male
Day workers	33.8 ± 0.4	0.94 ± 0.41 2	04:16 ± 03:05 a.m. 2
Shift workers 1	33.8 ± 0.5	0.83 ± 0.26 2	07:30 ± 05:09 a.m. 2
Female
Day workers	33.8 ± 0.4	0.92 ± 0.40 2	04:06 ± 02:55 a.m. 2
Shift workers 1	34.0 ± 0.5	0.81 ± 0.42 2	08:24 ± 05:07 a.m. 2

The data are shown as mean ± standard deviation or 12 h clock time. ¹ The temperature data were from the shift workers during the first 2 days of the morning shift; ² Significantly different between day and shift workers (p < 0.05), as determined by Student’s t-test.